CN116182586A - Heat exchanger assembly and air conditioning system having the same - Google Patents

Heat exchanger assembly and air conditioning system having the same Download PDF

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Publication number
CN116182586A
CN116182586A CN202111428085.XA CN202111428085A CN116182586A CN 116182586 A CN116182586 A CN 116182586A CN 202111428085 A CN202111428085 A CN 202111428085A CN 116182586 A CN116182586 A CN 116182586A
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CN
China
Prior art keywords
heat exchanger
reheater
control valve
header
air conditioning
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111428085.XA
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Chinese (zh)
Inventor
刘玉宝
陈丽莎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Danfoss AS
Original Assignee
Danfoss AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Danfoss AS filed Critical Danfoss AS
Priority to CN202111428085.XA priority Critical patent/CN116182586A/en
Priority to PCT/CN2022/132756 priority patent/WO2023093624A1/en
Publication of CN116182586A publication Critical patent/CN116182586A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F24F11/67—Switching between heating and cooling modes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/34—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates

Abstract

The invention discloses a heat exchanger assembly and an air conditioning system with the same. The heat exchanger assembly includes: a first heat exchanger portion and a second heat exchanger portion; and a control valve having an open position in which the first heat exchanger portion is in fluid communication with the second heat exchanger portion through the control valve and a closed position in which the first heat exchanger portion is fluidly isolated from the second heat exchanger portion through the control valve. By adopting the heat exchanger component provided by the invention, the performance of an air conditioning system can be improved.

Description

Heat exchanger assembly and air conditioning system having the same
Technical Field
Embodiments of the present invention relate to a heat exchanger assembly and an air conditioning system having the same.
Background
An air conditioning system with a reheater has a cooling mode and a reheating mode. In the cooling mode, refrigerant flows through the condenser but not through the reheater. In reheat mode. The refrigerant is required to flow through the condenser and the reheater.
Disclosure of Invention
It is an object of embodiments of the present invention to provide a heat exchanger assembly and an air conditioning system having the same, whereby, for example, performance of the air conditioning system may be improved.
Embodiments of the present invention provide a heat exchanger assembly comprising: a first heat exchanger portion and a second heat exchanger portion; and a control valve having an open position in which the first heat exchanger portion is in fluid communication with the second heat exchanger portion through the control valve and a closed position in which the first heat exchanger portion is fluidly isolated from the second heat exchanger portion through the control valve.
According to an embodiment of the invention, the first heat exchanger portion and the second heat exchanger portion are a first heat exchanger portion and a second heat exchanger portion of a heat exchanger, respectively, the heat exchanger comprising: the heat exchanger comprises a plurality of heat exchange tubes and two collecting pipes which are respectively connected with two ends of each heat exchange tube and are in fluid communication, wherein each collecting pipe of the two collecting pipes comprises a first collecting pipe part and a second collecting pipe part which are isolated in fluid, the heat exchanger is divided into a first heat exchanger part and a second heat exchanger part which are isolated in fluid, and the control valve is connected with the first collecting pipe part and the second collecting pipe part of one collecting pipe of the two collecting pipes so as to connect the first heat exchanger part and the second heat exchanger part in series.
According to an embodiment of the invention, the heat exchanger further comprises a partition provided in each of the two headers, the partition dividing each header into the first header portion and the second header portion, which are fluidly isolated.
According to an embodiment of the invention, the heat exchanger further comprises a partition arranged in said one of the two headers, said partition dividing said one header into said first header portion and said second header portion being fluidly isolated, and said first header portion and said second header portion of the other of the two headers are two fluidly isolated sub-flow pipes.
According to an embodiment of the invention, the first header portion and the second header portion of the one of the two headers are two fluidly isolated sub-manifold tubes, and the heat exchanger further comprises a partition arranged in the other of the two headers, the partition dividing the other header into the fluidly isolated first header portion and the second header portion.
According to an embodiment of the present invention, the control valve is provided inside the one header and mounted on the partition plate inside the one header.
According to an embodiment of the invention, the control valve is arranged outside the one header and connects the first header portion and the second header portion of the one header by a connecting pipe.
According to an embodiment of the invention, the heat exchanger assembly further comprises: a first storage vessel in fluid communication with the second manifold portion of the one manifold and connected between the control valve and the second manifold portion of the one manifold.
According to an embodiment of the invention, the heat exchanger assembly further comprises: a second storage vessel in fluid communication with a second header portion of the other of the two headers, and an outlet of the heat exchanger is disposed on the second storage vessel.
According to an embodiment of the invention, the number of heat exchange tubes connected to the second header portion is greater than the number of heat exchange tubes connected to the first header portion, and the inlet and outlet of the heat exchanger are connected to and in fluid communication with the first and second heat exchanger portions, respectively.
According to an embodiment of the invention, the first heat exchanger portion and the second heat exchanger portion are two heat exchangers, and the control valve is connected between the two heat exchangers to connect the two heat exchangers in series.
According to an embodiment of the invention, at least one of the two heat exchangers is a microchannel heat exchanger or a finned tube heat exchanger.
According to an embodiment of the invention, the control valve is a one-way valve allowing only refrigerant in the first heat exchanger portion to flow through the one-way valve into the second heat exchanger portion.
According to an embodiment of the invention, the control valve is a two-position two-way valve.
According to an embodiment of the invention, in the open position the first heat exchanger portion is connected in series with the second heat exchanger portion.
Embodiments of the present invention also provide a heat exchanger assembly comprising: a heat exchanger having an inlet and an outlet; and a control valve connected to the inlet of the heat exchanger and having an open position in which the control valve allows refrigerant to enter the heat exchanger through the control valve and the inlet of the heat exchanger, and a closed position in which the control valve closes the inlet of the heat exchanger.
The embodiment of the invention also provides an air conditioning system, which comprises: and the reheater is the heat exchanger assembly.
According to an embodiment of the present invention, the air conditioning system further includes: a compressor; a first heat exchanger as one of a condenser and an evaporator; and a second heat exchanger as the other of the condenser and the evaporator; wherein the compressor, the first heat exchanger and the second heat exchanger are connected in sequence from the compressor through the first heat exchanger to the second heat exchanger, and wherein the reheater is connected in parallel with the first heat exchanger.
According to an embodiment of the invention, in the cooling mode, the first heat exchanger acts as a condenser and the second heat exchanger acts as an evaporator, the reheater is not operated and the control valve of the reheater is closed, so that a portion of the refrigerant flowing from the first heat exchanger to the second heat exchanger flows into the second heat exchanger portion of the reheater and is stored in the second heat exchanger portion.
According to an embodiment of the present invention, in the reheat mode, the first heat exchanger functions as a condenser, and the second heat exchanger functions as an evaporator, and the reheater is operated and the control valve of the reheater is opened, so that refrigerant flows into the first heat exchanger portion of the reheater and flows from the first heat exchanger portion into the second heat exchanger portion via the control valve.
According to an embodiment of the invention, the first heat exchanger portion is arranged above the second heat exchanger portion.
According to an embodiment of the invention, the first heat exchanger portion and the second heat exchanger portion are two heat exchangers, the heat exchanger being the first heat exchanger portion being arranged above the heat exchanger being the second heat exchanger portion.
According to an embodiment of the invention, the first heat exchanger portion and the second heat exchanger portion are two heat exchangers, which are arranged side by side in the horizontal direction.
The embodiment of the invention also provides an air conditioning system, which comprises: and the reheater is the heat exchanger assembly.
According to an embodiment of the present invention, the air conditioning system further includes: a compressor; a first heat exchanger as one of a condenser and an evaporator; and a second heat exchanger as the other of the condenser and the evaporator; wherein the compressor, the first heat exchanger and the second heat exchanger are connected in sequence from the compressor through the first heat exchanger to the second heat exchanger, and wherein the reheater is connected in parallel with the first heat exchanger.
According to an embodiment of the present invention, in the cooling mode, the first heat exchanger functions as a condenser and the second heat exchanger functions as an evaporator, the reheater does not operate and the control valve of the reheater is closed, so that a part of the refrigerant flowing from the first heat exchanger to the second heat exchanger flows into the reheater and is stored in the reheater.
According to an embodiment of the present invention, in the reheat mode, the first heat exchanger functions as a condenser, and the second heat exchanger functions as an evaporator, and the reheater operates and the control valve of the reheater is opened, so that refrigerant flows into the reheater via the control valve.
The embodiment of the invention also provides an air conditioning system, which comprises: a compressor; a first heat exchanger as one of a condenser and an evaporator; a second heat exchanger as the other of the condenser and the evaporator; and a reheater connected in parallel with the first heat exchanger; wherein the compressor, the first heat exchanger and the second heat exchanger are connected in sequence from the compressor through the first heat exchanger to the second heat exchanger, and in a cooling mode, the first heat exchanger functions as a condenser and the second heat exchanger functions as an evaporator, the reheater is not operated, and a portion of the refrigerant flowing from the first heat exchanger to the second heat exchanger flows into the reheater and is stored in at least a portion of the reheater.
According to an embodiment of the invention, the reheater is a heat exchanger assembly as described above.
With the heat exchanger assembly and the air conditioning system having the heat exchanger assembly according to the embodiments of the present invention, for example, performance of the air conditioning system can be improved.
Drawings
FIG. 1 is a schematic diagram of an air conditioning system according to an embodiment of the present invention;
FIG. 2 is a schematic view of a heat exchanger assembly according to one embodiment of the present invention;
FIG. 3 is a schematic view of a heat exchanger assembly according to a variation of one embodiment of the present invention;
FIG. 4 is a schematic view of a heat exchanger assembly according to another variation of an embodiment of the present invention;
FIG. 5 is a schematic view of a heat exchanger assembly according to another embodiment of the present invention;
FIG. 6 is a schematic view of a heat exchanger assembly according to a variation of another embodiment of the present invention;
FIG. 7 is a schematic view of a heat exchanger assembly according to another variation of another embodiment of the present invention;
FIG. 8 is a schematic view of a heat exchanger assembly according to yet another variation of another embodiment of the present invention; and
fig. 9 is a schematic view of an air conditioning system according to a modification of the embodiment of the present invention.
Detailed Description
The invention is further described with reference to the drawings and detailed description.
A heat exchanger assembly according to an embodiment of the present invention is first described.
Referring to fig. 1 to 8, a heat exchanger assembly 100 according to an embodiment of the present invention includes: a first heat exchanger portion 11 and a second heat exchanger portion 12; and a control valve 20, said control valve 20 having an open position in which the first heat exchanger portion 11 is in fluid communication with the second heat exchanger portion 12 through said control valve 20, and a closed position in which the first heat exchanger portion 11 is fluidly isolated from the second heat exchanger portion 12 through said control valve 20. In the open position, the first heat exchanger portion 11 is connected in series with the second heat exchanger portion 12. The control valve may be a one-way valve as shown in the figures, which only allows the refrigerant in the first heat exchanger portion 11 to flow through the one-way valve into the second heat exchanger portion 12, whereas the refrigerant in the second heat exchanger portion 12 cannot flow through the one-way valve into the first heat exchanger portion 11. The one-way valve may be of a form common in the art, for example, which can be opened in one direction only under a certain pressure difference to realize a one-way sealing function. The control valve 20 connects the first heat exchanger portion 11 and the second heat exchanger portion 12 such that the refrigerant in the first heat exchanger portion 11 can flow into the second heat exchanger portion 12, while the refrigerant in the second heat exchanger portion 12 cannot flow into the first heat exchanger portion 11. The control valve may be a two-position two-way valve or the like.
Referring to fig. 2 to 4, in some embodiments of the invention, the first heat exchanger portion 11 and the second heat exchanger portion 12 are the first heat exchanger portion 11 and the second heat exchanger portion 12, respectively, of the heat exchanger 10, the heat exchanger 10 comprising: a plurality of heat exchange tubes 13, fins 14 alternately arranged with the plurality of heat exchange tubes 13, and two header pipes 15 respectively connected to both ends of each heat exchange tube 13 and in fluid communication, each header pipe 15 of the two header pipes 15 including a first header pipe portion 151 and a second header pipe portion 152 which are fluidly isolated such that the heat exchanger is divided into a first heat exchanger portion 11 and a second heat exchanger portion 12 which are fluidly isolated, the control valve 20 connecting the first header pipe portion 151 and the second header pipe portion 152 of one header pipe 15 of the two header pipes 15 to connect the first heat exchanger portion 11 and the second heat exchanger portion 12 in series. The inlet and outlet of the heat exchanger 10 are connected to and in fluid communication with the first 11 and second 12 heat exchanger portions, respectively, e.g. the inlet and outlet of the heat exchanger 10 are provided on the other header 15 and are connected to and in fluid communication with the first 151 and second 152 header portions, respectively. In the embodiment shown in fig. 2-4, the heat exchanger is a microchannel heat exchanger.
Referring to fig. 2-4, in some embodiments of the invention, the heat exchanger 10 further includes a baffle 16 disposed in each of the two headers 15, the baffle 16 separating each header 15 into the first header portion 151 and the second header portion 152 that are fluidly isolated.
Referring to fig. 2-4, in other embodiments of the present invention, the heat exchanger 10 further includes a baffle 16 disposed in the one of the two headers 15, the baffle 16 separating the one header 15 into the first header portion 151 and the second header portion 152 that are fluidly isolated, and the first header portion 151 and the second header portion 152 of the other of the two headers 15 are two fluidly isolated sub-manifold tubes.
Referring to fig. 2-4, in still other embodiments of the present invention, the first and second header portions 151, 152 of the one of the two headers 15 are two fluidly isolated sub-manifold tubes, and the heat exchanger 10 further includes a baffle 16 disposed in the other of the two headers 15, the baffle 16 separating the other header 15 into the fluidly isolated first and second header portions 151, 152.
Referring to fig. 4, in some embodiments of the present invention, the control valve 20 is disposed inside the one manifold 15 and mounted on the partition 16 inside the one manifold 15. Referring to fig. 2 and 3, in other embodiments of the present invention, the control valve 20 is disposed outside the one manifold 15 and connects the first and second manifold portions 151 and 152 of the one manifold 15 through the connection pipe 21.
To increase the volume of the second heat exchanger portion 12, referring to fig. 3, in some embodiments of the invention, the heat exchanger assembly 100 may further comprise a first storage vessel 31, the first storage vessel 31 being in fluid communication with the second header portion 152 of the one header 15 (e.g., via the connection tube 30) and being connected between the control valve 20 and the second header portion 152 of the one header 15. The refrigerant in the first heat exchanger portion 11 can flow into the second heat exchanger portion 12 through the first storage container 31 and the control valve 20. In other embodiments of the present invention, the heat exchanger assembly 100 may further include: a second storage vessel in fluid communication with the second header portion 12 of the other header 15 of the two headers 15 and on which the outlet of the heat exchanger 10 is disposed. The heat exchanger assembly 100 may include only the first storage container 31 or the second storage container, or may include both the first storage container 31 and the second storage container. Further, the number of heat exchange tubes 13 connected to the second header portion 152 may be greater than the number of heat exchange tubes 13 connected to the first header portion 151. Furthermore, the ratio of the second heat exchanger portion 12 to the first heat exchanger portion 11 may be increased.
Referring to fig. 5 to 8, in some embodiments of the present invention, the first heat exchanger portion 11 and the second heat exchanger portion 12 are two heat exchangers, and the control valve 20 is connected between the two heat exchangers to connect the two heat exchangers in series. As shown in fig. 5 to 8, the first heat exchanger portion 11 and the second heat exchanger portion may be arranged in the up-down direction or in the left-right direction. It will be appreciated that the first heat exchanger portion 11 and the second heat exchanger portion may also be arranged in the front-rear direction. At least one of the two heat exchangers may be a microchannel heat exchanger or a finned tube heat exchanger. In the embodiment shown in fig. 5, 6, the first heat exchanger portion 11 and the second heat exchanger portion 12 are two heat exchangers, and the heat exchanger as the first heat exchanger portion 11 and the heat exchanger as the second heat exchanger portion 12 are microchannel heat exchangers. In the embodiment shown in fig. 7, 8, the first heat exchanger part 11 and the second heat exchanger part 12 are two heat exchangers, the heat exchanger as the first heat exchanger part 11 and the heat exchanger as the second heat exchanger part 12 being finned tube heat exchangers. In the embodiment shown in fig. 2 to 6, the heat exchange tube is straight, and it will be understood that the heat exchange tube may be formed in a serpentine shape folded in the up-down direction as shown in fig. 7 and 8, with a certain distance between adjacent folded portions, and fins 14 may be provided therebetween. The serpentine heat exchange tube can be formed by bending a straight heat exchange tube, and also can be formed by connecting a plurality of heat exchange tubes through a U-shaped connecting tube. The first heat exchanger portion 11 and the second heat exchanger portion 12 each include one or more heat exchange tubes. The header 15 shown in fig. 2 to 6 is only schematic. The header of the present invention refers to a member that is connected to the heat exchange tubes and has a cavity for distributing heat exchange medium to or from the heat exchange tubes.
An air conditioning system according to an embodiment of the present invention is described below.
Referring to fig. 1, an air conditioning system 1000 according to an embodiment of the present invention includes a reheater 100A, which reheater 100A is the heat exchanger assembly 100 described above. The air conditioning system 1000 may further include: a compressor 200; a first heat exchanger 300 as one of a condenser and an evaporator; and a second heat exchanger 400 as the other of the condenser and the evaporator. The compressor 200, the first heat exchanger 300, and the second heat exchanger 400 are connected in order from the compressor 200 through the first heat exchanger 300 to the second heat exchanger 400. The reheater 100A is connected in parallel with the first heat exchanger 300. The air conditioning system 1000 may further include: a throttle device 500, such as an expansion valve. In fig. 1, arrows indicate the flow direction of the refrigerant in the reheat mode of the air conditioning system 1000.
Referring to fig. 1, in some embodiments of the invention, in a cooling mode, the first heat exchanger 300 acts as a condenser and the second heat exchanger 400 acts as an evaporator, the control valve 600 allows refrigerant from the compressor 200 to flow to the first heat exchanger 300, but does not allow refrigerant from the compressor 200 to flow to the reheater 100A, the reheater 100A is not operated and the control valve 20 of the reheater 100A is closed, such that a portion of the refrigerant flowing from the first heat exchanger 300 to the second heat exchanger 400 flows into the second heat exchanger portion 12 of the reheater 100A. For example, a portion of the refrigerant flowing from the first heat exchanger 300 to the throttle device 500 flows into the second heat exchanger portion 12 of the reheater 100A and is stored in the second heat exchanger portion 12. The first heat exchanger 300 functions as a condenser and the second heat exchanger 400 functions as an evaporator in the reheat mode, the control valve 600 allows the refrigerant from the compressor 200 to flow to the first heat exchanger 300 and the refrigerant from the compressor 200 to flow to the reheater 100A, the reheater 100A operates and the control valve 20 of the reheater 100A is opened, so that the refrigerant flows into the first heat exchanger part 11 of the reheater 100A and flows from the first heat exchanger part 11 to the second heat exchanger part 12 via the control valve 20. Finally, it flows out of the second heat exchanger section 12.
Referring to fig. 2-6, in some embodiments of the invention, the first heat exchanger portion 11 is disposed above the second heat exchanger portion 12. In the embodiment shown in fig. 5, 6, the first heat exchanger portion 11 and the second heat exchanger portion 12 are two heat exchangers, and the heat exchanger as the first heat exchanger portion 11 is disposed above the heat exchanger as the second heat exchanger portion 12. In the embodiment shown in fig. 7, 8, the first heat exchanger portion 11 and the second heat exchanger portion 12 are two heat exchangers, which are arranged side by side in the horizontal direction.
An air conditioning system with a reheater has a cooling mode and a reheating mode. If the amount of refrigerant in the cooling mode is just appropriate, then in the reheat mode the refrigerant needs to be diverted a portion to the reheater, resulting in an insufficient amount of refrigerant in the condenser, thereby triggering low pressure protection of the air conditioning system, causing the air conditioning system to cease operation.
According to an embodiment of the present invention, the reheater has a function of storing refrigerant in the cooling mode. The reheater stores a portion of the refrigerant in the cooling mode. In the reheating mode, the refrigerant of the condenser is not required to be split, the risk that the air conditioning system stops running due to low-pressure protection caused by lack of the refrigerant is avoided, and meanwhile, the heat exchange capacity of the condenser is guaranteed.
Referring to fig. 1, in the air conditioning system according to the embodiment of the present invention, in the reheat mode, the reheater 100A is operated and the control valve 20 of the reheater 100A is opened, so that the air conditioning system is normally operated, and the first heat exchanger part 11 and the second heat exchanger part 12 normally perform heat exchange. In the cooling mode, the reheater 100A is not operated and the control valve 20 of the reheater 100A is closed, so that a part of the refrigerant flowing from the first heat exchanger 300 to the second heat exchanger 400 flows backward to the second heat exchanger portion 12 of the reheater 100A through the outlet of the reheater 100A. With the control valve 20 closed, this portion of refrigerant is stored in the second heat exchanger portion 12 of the reheater 100A.
Referring to fig. 9, a heat exchanger assembly 100 according to a modification of the embodiment of the present invention includes: a heat exchanger 10, said heat exchanger 10 having an inlet and an outlet; and a control valve 20, the control valve 20 being connected to the inlet of the heat exchanger 10 and having an open position in which the control valve 20 allows refrigerant to enter the heat exchanger 10 through the control valve 20 and the inlet of the heat exchanger 10, and a closed position in which the control valve 20 closes the inlet of the heat exchanger 10. The control valve 20 may be a one-way valve or a two-way valve, etc.
Referring to fig. 9, an air conditioning system 1000 according to an embodiment of the present invention includes a reheater 100B, which reheater 100B is the heat exchanger assembly 100 described above. The air conditioning system 1000 may further include: a compressor 200; a first heat exchanger 300 as one of a condenser and an evaporator; and a second heat exchanger 400 as the other of the condenser and the evaporator. The compressor 200, the first heat exchanger 300, and the second heat exchanger 400 are connected in order from the compressor 200 through the first heat exchanger 300 to the second heat exchanger 400. The reheater 100A is connected in parallel with the first heat exchanger 300. The air conditioning system 1000 may further include: a throttle device 500, such as an expansion valve. In fig. 9, arrows indicate the flow direction of the refrigerant in the reheat mode of the air conditioning system 1000.
Referring to fig. 9, in some embodiments of the present invention, in a cooling mode, the first heat exchanger 300 serves as a condenser and the second heat exchanger 400 serves as an evaporator, the control valve 600 allows the refrigerant from the compressor 200 to flow to the first heat exchanger 300, but does not allow the refrigerant from the compressor 200 to flow to the reheater 100B, the reheater 100B is not operated and the control valve 20 of the reheater 100B is closed, so that a portion of the refrigerant flowing from the first heat exchanger 300 to the second heat exchanger 400 flows into the reheater 100B and is stored in the reheater 100B. For example, a portion of the refrigerant flowing from the first heat exchanger 300 to the throttle device 500 flows into the reheater 100B and is stored in the reheater 100B. In the reheat mode, the first heat exchanger 300 functions as a condenser, and the second heat exchanger 400 functions as an evaporator, the control valve 600 allows the refrigerant from the compressor 200 to flow to the first heat exchanger 300, and the refrigerant from the compressor 200 to flow to the reheater 100B, the reheater 100B operates and the control valve 20 of the reheater 100A is opened, so that the refrigerant flows into the reheater 100B via the control valve 20.
Referring to fig. 1 and 9, an air conditioning system 1000 according to an embodiment of the present invention includes: a compressor 200; a first heat exchanger 300 as one of a condenser and an evaporator; a second heat exchanger 400 as the other of the condenser and the evaporator; and reheaters 100A, 100B, the reheaters 100A, 100B being connected in parallel with the first heat exchanger 300. The compressor 200, the first heat exchanger 300, and the second heat exchanger 400 are connected in order from the compressor 200 through the first heat exchanger 300 to the second heat exchanger 400, and in the cooling mode, the first heat exchanger 300 functions as a condenser, and the second heat exchanger 400 functions as an evaporator, the reheater 100A, 100B is not operated, and a portion of the refrigerant flowing from the first heat exchanger 300 to the second heat exchanger 400 flows into the reheater 100A, 100B and is stored in at least a portion of the reheater 100A, 100B. The reheaters 100A, 100B may be heat exchanger assemblies 100 described above.
According to the air conditioning system provided by the embodiment of the invention, the reheater has the function of storing the refrigerant when the air conditioning system is in the refrigerating mode, and the refrigerant can be stored in at least one part of the reheater, so that the quantity of the refrigerant required by the air conditioning system in the refrigerating mode and in the reheating mode is ensured, and the heat exchange performance in each mode is ensured. Furthermore, with the heat exchanger assembly according to an embodiment of the present invention, no extra components are added to the air conditioning system.
For the air conditioning system shown in fig. 9, the entire reheater can store refrigerant in the cooling mode, so that the air conditioning system can store more refrigerant. This is advantageous when the air conditioning system needs to store more refrigerant.
With the air conditioning system shown in fig. 1 and the heat exchanger assembly shown in fig. 2 to 8, it is sufficient to store the refrigerant in the second heat exchanger portion of the heat exchanger in the cooling mode, and it is possible to save the refrigerant as long as the needs of the air conditioning system are satisfied.
Although the above embodiments have been described, some of the features of the above embodiments can be combined to form new embodiments.
Further, although the embodiments of the present invention have been described, the above embodiments are merely examples employed for the convenience of understanding the present invention and are not intended to be limiting. Modifications to the above would be obvious to those of ordinary skill in the art, without departing from the spirit and scope of the present invention.

Claims (29)

1. A heat exchanger assembly, comprising:
a first heat exchanger portion and a second heat exchanger portion; and
a control valve having an open position in which the first heat exchanger portion is in fluid communication with the second heat exchanger portion through the control valve and a closed position in which the first heat exchanger portion is fluidly isolated from the second heat exchanger portion through the control valve.
2. The heat exchanger assembly of claim 1, wherein:
the first heat exchanger portion and the second heat exchanger portion are respectively a first heat exchanger portion and a second heat exchanger portion of a heat exchanger, the heat exchanger comprising: the heat exchanger comprises a plurality of heat exchange tubes and two collecting pipes which are respectively connected with two ends of each heat exchange tube and are in fluid communication, wherein each collecting pipe of the two collecting pipes comprises a first collecting pipe part and a second collecting pipe part which are isolated in fluid, the heat exchanger is divided into a first heat exchanger part and a second heat exchanger part which are isolated in fluid, and the control valve is connected with the first collecting pipe part and the second collecting pipe part of one collecting pipe of the two collecting pipes so as to connect the first heat exchanger part and the second heat exchanger part in series.
3. The heat exchanger assembly of claim 2, wherein:
the heat exchanger also includes a baffle disposed in each of the two headers, the baffle separating each header into the first header portion and the second header portion that are fluidly isolated.
4. The heat exchanger assembly of claim 2, wherein:
the heat exchanger further includes a baffle disposed in the one of the two headers, the baffle separating the one header into the first header portion and the second header portion that are fluidly isolated, and the first header portion and the second header portion of the other of the two headers are two fluidly isolated subset flow pipes.
5. The heat exchanger assembly of claim 2, wherein:
the first header portion and the second header portion of the one of the two headers are two fluidly isolated sub-manifolds, and
the heat exchanger also includes a baffle disposed in the other of the two headers, the baffle separating the other header into the fluidly isolated first header portion and the second header portion.
6. The heat exchanger assembly of claim 3 or 4, wherein:
the control valve is disposed inside the one header and mounted on the partition within the one header.
7. The heat exchanger assembly of any one of claims 2 to 5, wherein:
the control valve is disposed outside the one header and connects the first header portion and the second header portion of the one header through a connection pipe.
8. The heat exchanger assembly of claim 7, further comprising:
a first storage vessel in fluid communication with the second manifold portion of the one manifold and connected between the control valve and the second manifold portion of the one manifold.
9. The heat exchanger assembly of claim 7, further comprising:
a second storage vessel in fluid communication with a second header portion of the other of the two headers, and an outlet of the heat exchanger is disposed on the second storage vessel.
10. The heat exchanger assembly of claim 2, wherein:
the number of heat exchange tubes connected to the second header portion is greater than the number of heat exchange tubes connected to the first header portion, and the inlet and outlet of the heat exchanger are connected to and in fluid communication with the first and second heat exchanger portions, respectively.
11. The heat exchanger assembly of claim 1, wherein:
the first heat exchanger portion and the second heat exchanger portion are two heat exchangers, and the control valve is connected between the two heat exchangers to connect the two heat exchangers in series.
12. The heat exchanger assembly of claim 11, wherein:
at least one of the two heat exchangers is a microchannel heat exchanger or a finned tube heat exchanger.
13. The heat exchanger assembly of claim 1, wherein:
the control valve is a one-way valve which allows only refrigerant in the first heat exchanger portion to flow through the one-way valve into the second heat exchanger portion.
14. The heat exchanger assembly of claim 1, wherein:
the control valve is a two-position two-way valve.
15. The heat exchanger assembly of claim 1, wherein:
in the open position, the first heat exchanger portion is connected in series with the second heat exchanger portion.
16. A heat exchanger assembly, comprising:
a heat exchanger having an inlet and an outlet; and
a control valve is connected to the inlet of the heat exchanger and has an open position in which the control valve allows refrigerant to enter the heat exchanger through the control valve and the inlet of the heat exchanger, and a closed position in which the control valve closes the inlet of the heat exchanger.
17. An air conditioning system, comprising:
a reheater which is a heat exchanger assembly according to claim 1.
18. The air conditioning system of claim 17, further comprising:
a compressor;
a first heat exchanger as one of a condenser and an evaporator; and
a second heat exchanger as the other of the condenser and the evaporator;
wherein the compressor, the first heat exchanger and the second heat exchanger are connected in order from the compressor through the first heat exchanger to the second heat exchanger, and
wherein the reheater is connected in parallel with the first heat exchanger.
19. The air conditioning system of claim 18, wherein:
in the cooling mode, the first heat exchanger acts as a condenser and the second heat exchanger acts as an evaporator, the reheater is not operated and the control valve of the reheater is closed such that a portion of the refrigerant flowing from the first heat exchanger to the second heat exchanger flows into and is stored in the second heat exchanger portion of the reheater.
20. The air conditioning system of claim 18 or 19, wherein:
in reheat mode, the first heat exchanger acts as a condenser and the second heat exchanger acts as an evaporator, the reheater operating and the control valve of the reheater being open such that refrigerant flows into the first heat exchanger portion of the reheater and from the first heat exchanger portion into the second heat exchanger portion via the control valve.
21. The air conditioning system of claim 17, wherein:
the first heat exchanger portion is disposed above the second heat exchanger portion.
22. The air conditioning system of claim 17, wherein:
the first heat exchanger portion and the second heat exchanger portion are two heat exchangers, and the heat exchanger serving as the first heat exchanger portion is arranged above the heat exchanger serving as the second heat exchanger portion.
23. The air conditioning system of claim 17, wherein:
the first heat exchanger part and the second heat exchanger part are two heat exchangers, and the two heat exchangers are arranged side by side in the horizontal direction.
24. An air conditioning system, comprising:
a reheater which is a heat exchanger assembly according to claim 16.
25. The air conditioning system of claim 24, further comprising:
a compressor;
a first heat exchanger as one of a condenser and an evaporator; and
a second heat exchanger as the other of the condenser and the evaporator;
wherein the compressor, the first heat exchanger and the second heat exchanger are connected in order from the compressor through the first heat exchanger to the second heat exchanger, and
wherein the reheater is connected in parallel with the first heat exchanger.
26. The air conditioning system of claim 25, wherein:
in the cooling mode, the first heat exchanger acts as a condenser and the second heat exchanger acts as an evaporator, the reheater is not operated and the control valve of the reheater is closed, so that a portion of the refrigerant flowing from the first heat exchanger to the second heat exchanger flows into the reheater and is stored in the reheater.
27. The air conditioning system of claim 25 or 26, wherein:
in the reheat mode, the first heat exchanger acts as a condenser and the second heat exchanger acts as an evaporator, the reheater operates and a control valve of the reheater is opened such that refrigerant flows into the reheater via the control valve.
28. An air conditioning system, comprising:
a compressor;
a first heat exchanger as one of a condenser and an evaporator;
a second heat exchanger as the other of the condenser and the evaporator; and
the reheater is connected with the first heat exchanger in parallel;
wherein the compressor, the first heat exchanger and the second heat exchanger are connected in order from the compressor through the first heat exchanger to the second heat exchanger, and
in the cooling mode, the first heat exchanger acts as a condenser and the second heat exchanger acts as an evaporator, the reheater is not operated, and a portion of the refrigerant flowing from the first heat exchanger to the second heat exchanger flows into the reheater and is stored in at least a portion of the reheater.
29. The air conditioning system of claim 28, wherein:
the reheater is a heat exchanger assembly according to claim 1 or 16.
CN202111428085.XA 2021-11-26 2021-11-26 Heat exchanger assembly and air conditioning system having the same Pending CN116182586A (en)

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CN202111428085.XA CN116182586A (en) 2021-11-26 2021-11-26 Heat exchanger assembly and air conditioning system having the same
PCT/CN2022/132756 WO2023093624A1 (en) 2021-11-26 2022-11-18 Heat exchanger assembly and air conditioning system having heat exchanger assembly

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CN103206811B (en) * 2013-04-07 2015-09-30 广东美的制冷设备有限公司 Parallel-flow heat exchanger and air-conditioner
CN104949318B (en) * 2015-06-30 2017-09-22 广东美的制冷设备有限公司 Heat exchanger, air-conditioning system and heat-exchange method
CN105352344B (en) * 2015-11-23 2017-05-03 广东美的制冷设备有限公司 Parallel flow heat exchanger, air conditioner with the same and control method of air conditioner
CN106642470A (en) * 2016-12-30 2017-05-10 广东申菱环境系统股份有限公司 Water-cooling type thermostatic and humidity-static air conditioner
US10801742B2 (en) * 2018-04-09 2020-10-13 Lennox Industries Inc. Method and apparatus for re-heat circuit operation
CN113137673A (en) * 2021-03-04 2021-07-20 青岛海尔空调电子有限公司 Air conditioner and method and device for controlling dehumidification of air conditioner

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